louis@bauer ~ $ vnstat -m

        eth0

           month        rx      |       tx      |    total
        ------------------------+---------------+---------------
          Sep '06   435,411 MB  |   112,126 MB  |   547,537 MB
          Oct '06   190,205 MB  |    73,417 MB  |   263,623 MB
        ------------------------+---------------+---------------
        estimated 1,048,240 MB  |   404,609 MB  | 1,452,849 MB